The Caspian Tern is the largest tern in the world. It is a migratory species. During the spring and summer months, they breed along large lakes and ocean coasts in North America (including the Great Lakes), Europe, Asia, Africa, Australia, and New Zealand. The birds in North America migrate to southern coasts, West Indies, and northern most South America during the winter months.
In Florida, migrant Caspian Terns can be found throughout most of Florida during the winter months. There is a small permanent resident population that breeds in the Tampa Bay area.